/* roulang page: index */
:root {
      --primary: #1E40AF;
      --primary-light: #2563EB;
      --primary-subtle: #EFF6FF;
      --accent-cyan: #0EA5E9;
      --accent-orange: #F97316;
      --bg-main: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0F172A;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --card-radius: 16px;
      --shadow-soft: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
      --shadow-hover: 0 16px 32px -4px rgba(30, 64, 175, 0.12);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    button, input, select {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* Header & Navigation */
    .top-bar {
      background-color: #0B132B;
      color: #94A3B8;
      font-size: 0.85rem;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-support-item {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .device-support-tag {
      background: rgba(255, 255, 255, 0.1);
      padding: 2px 8px;
      border-radius: 4px;
      margin-left: 6px;
      font-size: 0.75rem;
      color: #E2E8F0;
    }

    .main-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }
    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 76px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-icon {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.4rem;
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }
    .logo-text {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo-sub {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--text-muted);
      display: block;
      letter-spacing: 1px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      transition: var(--transition);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover {
      color: var(--primary-light);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-light);
      transition: var(--transition);
    }
    .nav-link:hover::after {
      width: 100%;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 24px;
      border-radius: 8px;
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(30, 64, 175, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
    }
    .btn-accent {
      background: var(--accent-orange);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
    }
    .btn-accent:hover {
      background: #EA580C;
      transform: translateY(-2px);
    }
    .btn-outline {
      background: #FFFFFF;
      color: var(--primary);
      border-color: #BFDBFE;
    }
    .btn-outline:hover {
      background: var(--primary-subtle);
      border-color: var(--primary);
    }

    .mobile-toggle {
      display: none;
      font-size: 1.5rem;
      background: none;
      border: none;
      color: var(--text-main);
      cursor: pointer;
    }

    /* Section Global Styles */
    section {
      padding: 88px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 56px;
    }
    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 14px;
      background: var(--primary-subtle);
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 9999px;
      margin-bottom: 14px;
      border: 1px solid rgba(37, 99, 235, 0.15);
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 1: Hero (Blueprint requirement: Map/Local Area Badges + Nearby Entries) */
    .hero-section {
      padding: 80px 0 100px;
      background: linear-gradient(180deg, #F0F7FF 0%, #FFFFFF 100%);
      position: relative;
      overflow: hidden;
    }
    .hero-section::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: url('/assets/images/7bb84481bfb06bc9.webp') center/cover no-repeat;
      opacity: 0.08;
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-badge-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 20px;
    }
    .region-chip {
      background: #FFFFFF;
      border: 1px solid #CBD5E1;
      border-radius: 6px;
      padding: 4px 10px;
      font-size: 0.8rem;
      font-weight: 600;
      color: #334155;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .region-chip i {
      color: var(--accent-cyan);
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 800;
      color: #0F172A;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.8px;
    }
    .hero-title span {
      background: linear-gradient(120deg, var(--primary), var(--accent-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.12rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 36px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-local-portals {
      background: #FFFFFF;
      padding: 18px 24px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
    }
    .hero-local-title {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .nearby-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .portal-tag {
      background: #F8FAFC;
      border: 1px solid #E2E8F0;
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .portal-tag:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
    }

    .hero-visual-card {
      background: #FFFFFF;
      border-radius: 20px;
      border: 1px solid #E2E8F0;
      padding: 24px;
      box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.12);
      position: relative;
    }
    .mockup-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 16px;
      border-bottom: 1px solid #F1F5F9;
    }
    .runner-status-chip {
      font-size: 0.75rem;
      font-weight: 700;
      color: #16A34A;
      background: #DCFCE7;
      padding: 4px 10px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }
    .metric-spotlight-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 20px;
    }
    .spotlight-metric-box {
      background: #F8FAFC;
      border: 1px solid #F1F5F9;
      border-radius: 12px;
      padding: 14px;
    }
    .spotlight-metric-label {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 4px;
    }
    .spotlight-metric-val {
      font-size: 1.5rem;
      font-weight: 800;
      color: #0F172A;
    }
    .spotlight-metric-trend {
      font-size: 0.75rem;
      font-weight: 600;
      color: #16A34A;
    }
    .hero-track-visual {
      border-radius: 12px;
      overflow: hidden;
      position: relative;
      height: 180px;
    }
    .hero-track-visual img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* Section 2: 合集目录与跑力矩阵 (#directory) */
    .catalog-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .catalog-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .catalog-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: #BFDBFE;
    }
    .catalog-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: var(--primary-subtle);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
    }
    .catalog-title {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #0F172A;
    }
    .catalog-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }
    .catalog-link {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary-light);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* Section 3: 运动科学体系介绍 (#about) */
    .about-section {
      background: var(--bg-main);
    }
    .about-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .about-visual {
      position: relative;
    }
    .about-img-frame {
      border-radius: 20px;
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      border: 1px solid var(--border-color);
    }
    .floating-badge-about {
      position: absolute;
      bottom: -20px;
      right: 20px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 16px 20px;
      border-radius: 14px;
      box-shadow: var(--shadow-hover);
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .pulse-dot {
      width: 12px;
      height: 12px;
      background: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
    }
    .about-feature-list {
      margin-top: 28px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .about-feature-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }
    .check-icon-box {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: #DCFCE7;
      color: #16A34A;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      margin-top: 3px;
      flex-shrink: 0;
    }

    /* Section 4: 核心技术与数据分析优势六宫格 (#features) */
    .features-section {
      background: #FFFFFF;
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 32px 28px;
      transition: var(--transition);
      position: relative;
    }
    .feature-card:hover {
      border-color: var(--primary-light);
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .feature-icon-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
    }
    .feature-icon-circle {
      width: 56px;
      height: 56px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
    }
    .icon-blue { background: #DBEAFE; color: #1D4ED8; }
    .icon-emerald { background: #D1FAE5; color: #047857; }
    .icon-indigo { background: #E0E7FF; color: #4338CA; }
    .icon-amber { background: #FEF3C7; color: #B45309; }
    .icon-rose { background: #FFE4E6; color: #BE123C; }
    .icon-cyan { background: #CFFAFE; color: #0E7490; }

    .feature-tag-top {
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      background: #F1F5F9;
      color: #475569;
    }
    .feature-card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 12px;
    }
    .feature-card-desc {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.68;
    }

    /* Section 5: 多维落地应用场景演示 (#scenarios) */
    .scenarios-section {
      background: #F1F5F9;
    }
    .scenario-tabs-content {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .scenario-box {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
    }
    .scenario-img-holder {
      height: 200px;
      position: relative;
    }
    .scenario-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .scenario-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(15, 23, 42, 0.75);
      color: #FFFFFF;
      backdrop-filter: blur(4px);
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 600;
    }
    .scenario-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .scenario-title {
      font-size: 1.22rem;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 10px;
    }
    .scenario-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .scenario-metrics-list {
      background: #F8FAFC;
      border-radius: 8px;
      padding: 12px;
      margin-bottom: 18px;
    }
    .scenario-metric-row {
      display: flex;
      justify-content: space-between;
      font-size: 0.82rem;
      padding: 4px 0;
      border-bottom: 1px dashed #E2E8F0;
    }
    .scenario-metric-row:last-child {
      border-bottom: none;
    }
    .scenario-metric-key {
      color: #64748B;
    }
    .scenario-metric-val {
      font-weight: 700;
      color: #0F172A;
    }

    /* Section 6: 算力底座与算法理念区 (#engine) - Deep Dark */
    .engine-section {
      background: #0B1120;
      color: #F8FAFC;
      padding: 100px 0;
      position: relative;
      overflow: hidden;
    }
    .engine-section::after {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, rgba(15, 23, 42, 0) 70%);
      pointer-events: none;
    }
    .engine-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 60px;
    }
    .engine-title {
      font-size: 2.3rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .engine-desc {
      color: #94A3B8;
      font-size: 1.05rem;
      line-height: 1.7;
    }
    .engine-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      position: relative;
      z-index: 2;
    }
    .engine-card {
      background: rgba(30, 41, 59, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--card-radius);
      padding: 32px;
      backdrop-filter: blur(10px);
      transition: var(--transition);
    }
    .engine-card:hover {
      border-color: var(--accent-cyan);
      transform: translateY(-5px);
      background: rgba(30, 41, 59, 0.85);
    }
    .engine-badge-node {
      font-size: 0.75rem;
      font-family: monospace;
      padding: 4px 8px;
      border-radius: 4px;
      background: rgba(14, 165, 233, 0.15);
      color: var(--accent-cyan);
      display: inline-block;
      margin-bottom: 16px;
    }
    .engine-card-title {
      font-size: 1.28rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 12px;
    }
    .engine-card-desc {
      color: #94A3B8;
      font-size: 0.94rem;
      line-height: 1.68;
    }

    /* Section 7: 产品套件与分析版本矩阵 (#products) */
    .products-section {
      background: #FFFFFF;
    }
    .product-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      align-items: center;
    }
    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 36px 32px;
      transition: var(--transition);
      position: relative;
    }
    .product-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 20px 40px -10px rgba(37, 99, 235, 0.2);
      transform: scale(1.04);
      z-index: 10;
    }
    .featured-tag-pill {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: linear-gradient(135deg, var(--accent-orange), #EA580C);
      color: #FFFFFF;
      font-size: 0.8rem;
      font-weight: 800;
      padding: 4px 16px;
      border-radius: 999px;
      letter-spacing: 0.5px;
      box-shadow: 0 4px 10px rgba(249, 115, 22, 0.3);
    }
    .product-tier-name {
      font-size: 1.4rem;
      font-weight: 800;
      color: #0F172A;
      margin-bottom: 8px;
    }
    .product-tier-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 44px;
    }
    .product-features-box {
      list-style: none;
      margin-bottom: 32px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .product-feature-line {
      font-size: 0.9rem;
      color: #334155;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .product-feature-line i {
      color: var(--primary);
      font-size: 0.85rem;
    }

    /* Section 8: 标杆跑者与训练营案例库 (#cases) */
    .cases-section {
      background: var(--bg-main);
    }
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 32px;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .case-header-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 20px;
    }
    .case-runner-info {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .runner-avatar-box {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: var(--primary-subtle);
      border: 2px solid #BFDBFE;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      color: var(--primary);
      font-weight: 700;
    }
    .runner-name {
      font-size: 1.15rem;
      font-weight: 700;
      color: #0F172A;
    }
    .runner-role {
      font-size: 0.82rem;
      color: var(--text-muted);
    }
    .case-target-badge {
      background: #EFF6FF;
      color: var(--primary);
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 6px;
    }
    .comparison-bars-grid {
      background: #F8FAFC;
      border-radius: 12px;
      padding: 20px;
      margin: 20px 0;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .comp-item-label {
      display: flex;
      justify-content: space-between;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: #475569;
    }
    .comp-bar-shell {
      height: 10px;
      background: #E2E8F0;
      border-radius: 999px;
      overflow: hidden;
      position: relative;
    }
    .comp-bar-fill {
      height: 100%;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--accent-cyan), var(--primary));
    }

    /* Section 9: 关键指标数据统计条 (#metrics) */
    .metrics-section {
      background: linear-gradient(135deg, #1E3A8A 0%, #0F172A 100%);
      color: #FFFFFF;
      padding: 64px 0;
    }
    .metrics-grid-four {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
      text-align: center;
    }
    .metric-stat-item {
      padding: 10px;
      border-right: 1px solid rgba(255, 255, 255, 0.1);
    }
    .metric-stat-item:last-child {
      border-right: none;
    }
    .metric-stat-num {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.1;
      margin-bottom: 8px;
      background: linear-gradient(180deg, #FFFFFF, #93C5FD);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -1px;
    }
    .metric-stat-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #E2E8F0;
      margin-bottom: 4px;
    }
    .metric-stat-sub {
      font-size: 0.82rem;
      color: #94A3B8;
    }

    /* Section 10: 社会认同与用户综合评价 (#reviews) */
    .reviews-section {
      background: #FFFFFF;
    }
    .reviews-cards-wrap {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .review-bubble {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-stars {
      color: #F59E0B;
      font-size: 0.95rem;
      margin-bottom: 14px;
      display: flex;
      gap: 4px;
    }
    .review-content-quote {
      font-size: 0.95rem;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 22px;
      font-style: italic;
    }
    .review-author-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 16px;
      border-top: 1px solid #F1F5F9;
    }
    .review-author-icon {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #EFF6FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }
    .review-author-name {
      font-size: 0.98rem;
      font-weight: 700;
      color: #0F172A;
    }
    .review-author-ident {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* Section 11: 跑步前沿洞察与资讯证据卡片 (#insights) */
    .insights-section {
      background: var(--bg-main);
    }
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .insight-card {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .insight-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .insight-img-cover {
      height: 190px;
      position: relative;
    }
    .insight-img-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .insight-category-chip {
      position: absolute;
      top: 12px;
      left: 12px;
      background: var(--primary);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
    }
    .insight-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .insight-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .insight-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #0F172A;
      line-height: 1.45;
      margin-bottom: 12px;
    }
    .insight-abstract {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .insight-btn {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary-light);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* Section 12: 数据权威与安全异议拆解 FAQ (#faq) */
    .faq-section {
      background: #FFFFFF;
    }
    .faq-accordion-box {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: 12px;
      background: #FFFFFF;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item[open] {
      border-color: #BFDBFE;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.08);
    }
    .faq-summary {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #0F172A;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      user-select: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-summary i {
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    .faq-item[open] .faq-summary i {
      transform: rotate(180deg);
    }
    .faq-answer {
      padding: 0 24px 22px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.75;
      border-top: 1px solid #F1F5F9;
      margin-top: 6px;
      padding-top: 16px;
    }

    /* Section 13: 权威保障与综合转化表单 (#cta) */
    .cta-section {
      background: linear-gradient(180deg, #F8FAFC 0%, #EFF6FF 100%);
      padding: 90px 0 120px;
    }
    .cta-card-shell {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 24px;
      padding: 48px;
      box-shadow: 0 20px 45px -10px rgba(15, 23, 42, 0.08);
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
    }
    .cta-text-side h2 {
      font-size: 2.2rem;
      font-weight: 800;
      color: #0F172A;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .cta-text-side p {
      font-size: 1.02rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .cta-trust-items {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .trust-row {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.92rem;
      font-weight: 600;
      color: #334155;
    }
    .trust-row i {
      color: #16A34A;
      font-size: 1.1rem;
    }

    .cta-form-side {
      background: #F8FAFC;
      border: 1px solid #E2E8F0;
      border-radius: 16px;
      padding: 32px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 700;
      color: #334155;
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid #CBD5E1;
      font-size: 0.92rem;
      background: #FFFFFF;
      transition: var(--transition);
      outline: none;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }
    .form-note {
      font-size: 0.78rem;
      color: #94A3B8;
      margin-top: 12px;
      text-align: center;
      line-height: 1.5;
    }

    /* Mobile Sticky Bar */
    .mobile-sticky-bar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: #FFFFFF;
      border-top: 1px solid #E2E8F0;
      padding: 10px 16px;
      z-index: 999;
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
    }
    .mobile-sticky-inner {
      display: flex;
      gap: 12px;
    }
    .mobile-sticky-inner .btn {
      flex: 1;
      font-size: 0.9rem;
      padding: 12px 0;
    }

    /* Footer */
    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      padding: 72px 0 36px;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand-title {
      font-size: 1.35rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .footer-brand-desc {
      font-size: 0.88rem;
      line-height: 1.7;
      margin-bottom: 20px;
      color: #64748B;
    }
    .footer-col-title {
      font-size: 1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-link-item a {
      color: #94A3B8;
      transition: var(--transition);
    }
    .footer-link-item a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }
    .footer-contact-info {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .contact-line {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.86rem;
      color: #94A3B8;
    }
    .contact-line i {
      color: var(--accent-cyan);
      margin-top: 4px;
    }
    .footer-bottom-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
    }

    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .about-split {
        grid-template-columns: 1fr;
      }
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .catalog-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .product-cards-grid {
        grid-template-columns: 1fr;
      }
      .product-card.featured {
        transform: none;
      }
      .engine-cards-grid {
        grid-template-columns: 1fr;
      }
      .cta-card-shell {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .metrics-grid-four {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-stat-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 20px;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        border-bottom: 1px solid var(--border-color);
        gap: 18px;
        align-items: flex-start;
      }
      .nav-menu.active {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-actions .btn-primary {
        display: none;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .section-title {
        font-size: 1.8rem;
      }
      .catalog-grid,
      .features-grid,
      .scenarios-section .scenario-tabs-content,
      .cases-grid,
      .reviews-cards-wrap,
      .insights-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .mobile-sticky-bar {
        display: block;
      }
      body {
        padding-bottom: 68px;
      }
    }